An apparatus to measure the thermal conductivity of insulation panels at sub-ambient temperature

Srinivas Vanapalli, T. Klünder, I. Hegeman, A.H. Tolboom, Hermanus J.M. ter Brake

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Abstract

A single-sided guarded-plate apparatus has been developed to measure the thermal conductivity of insulation panels of sub-meter size at sub-ambient temperatures ranging from 250 to 300 K. This apparatus allows thermal conductivity measurements to be performed at large temperature differences simulating the actual operating conditions in an application and can accommodate panels of various thickness. The cold plate in the apparatus is cooled with a flow thermostat. The reduction in performance due to the heat conductance along the edge of a vacuum insulation panel is significant at small panel sizes and is detrimental to the end application. The effective thermal conductivity of square vacuum insulation panels of several thickness and area is measured, and is observed that the square panels of side 10 and 20 cm have about twice higher thermal conductivity than their larger counterparts due to the heat leak along the edges of these panels.
Original languageEnglish
Pages (from-to)644-650
JournalInternational journal of refrigeration
Volume74
DOIs
Publication statusPublished - 2017

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Insulation
Thermal conductivity
Vacuum
Thermostats
Temperature
Hot Temperature

Keywords

  • METIS-320220
  • IR-102834

Cite this

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title = "An apparatus to measure the thermal conductivity of insulation panels at sub-ambient temperature",
abstract = "A single-sided guarded-plate apparatus has been developed to measure the thermal conductivity of insulation panels of sub-meter size at sub-ambient temperatures ranging from 250 to 300 K. This apparatus allows thermal conductivity measurements to be performed at large temperature differences simulating the actual operating conditions in an application and can accommodate panels of various thickness. The cold plate in the apparatus is cooled with a flow thermostat. The reduction in performance due to the heat conductance along the edge of a vacuum insulation panel is significant at small panel sizes and is detrimental to the end application. The effective thermal conductivity of square vacuum insulation panels of several thickness and area is measured, and is observed that the square panels of side 10 and 20 cm have about twice higher thermal conductivity than their larger counterparts due to the heat leak along the edges of these panels.",
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An apparatus to measure the thermal conductivity of insulation panels at sub-ambient temperature. / Vanapalli, Srinivas; Klünder, T.; Hegeman, I.; Tolboom, A.H.; ter Brake, Hermanus J.M.

In: International journal of refrigeration, Vol. 74, 2017, p. 644-650.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - An apparatus to measure the thermal conductivity of insulation panels at sub-ambient temperature

AU - Vanapalli, Srinivas

AU - Klünder, T.

AU - Hegeman, I.

AU - Tolboom, A.H.

AU - ter Brake, Hermanus J.M.

PY - 2017

Y1 - 2017

N2 - A single-sided guarded-plate apparatus has been developed to measure the thermal conductivity of insulation panels of sub-meter size at sub-ambient temperatures ranging from 250 to 300 K. This apparatus allows thermal conductivity measurements to be performed at large temperature differences simulating the actual operating conditions in an application and can accommodate panels of various thickness. The cold plate in the apparatus is cooled with a flow thermostat. The reduction in performance due to the heat conductance along the edge of a vacuum insulation panel is significant at small panel sizes and is detrimental to the end application. The effective thermal conductivity of square vacuum insulation panels of several thickness and area is measured, and is observed that the square panels of side 10 and 20 cm have about twice higher thermal conductivity than their larger counterparts due to the heat leak along the edges of these panels.

AB - A single-sided guarded-plate apparatus has been developed to measure the thermal conductivity of insulation panels of sub-meter size at sub-ambient temperatures ranging from 250 to 300 K. This apparatus allows thermal conductivity measurements to be performed at large temperature differences simulating the actual operating conditions in an application and can accommodate panels of various thickness. The cold plate in the apparatus is cooled with a flow thermostat. The reduction in performance due to the heat conductance along the edge of a vacuum insulation panel is significant at small panel sizes and is detrimental to the end application. The effective thermal conductivity of square vacuum insulation panels of several thickness and area is measured, and is observed that the square panels of side 10 and 20 cm have about twice higher thermal conductivity than their larger counterparts due to the heat leak along the edges of these panels.

KW - METIS-320220

KW - IR-102834

U2 - 10.1016/j.ijrefrig.2016.11.022

DO - 10.1016/j.ijrefrig.2016.11.022

M3 - Article

VL - 74

SP - 644

EP - 650

JO - International journal of refrigeration

JF - International journal of refrigeration

SN - 0140-7007

ER -